Rivet-setting machine



(No Model.) 3 Sheets-Sheet 1.

H H CUMMINGS RIVET SBTTINGMAGHINE.

No. 513,634. Patented-Jan, 30, 18-94.

636886. WM. OFMA/ (No Model.)

- a Sheets-Sihet 2. H. H. CUMMINGS. RIVET SETTING MACHINE.

PatentedJan. 30, 1894.

3 Sheets-Sheet 3.

(No 'Model.)

Patented Jan. 30, 1894.

S m WA M G mm nuT T E W R 'Nrrn TIENRY H. CUMMINGS, OF MALDEN,MASSACHUSETTS.

RlVET-SETTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 513,634., dated January30, 1894.

Application filed May 9, 1893. Serial No.4=73.501. .(No model.)

To all whom it may cmtcern:

Be it known that I, HENRY I-I. CUMMINGS, of Maiden, county ofMiddleseX,State of Massachusetts, have invented an Improvement inRivet-Setting Machines, of which the following description, inconnection with the accompanying drawings, is a specification, likeletters and figures on the drawings representing like parts.

This invention has for its object to improve that class of rivet-setting machines adapted to set tubular rivets, my improved invention being animprovement on that represented in application Serial No. 439,972, filedJuly 14:, 1892. .In the machine described in the said application therivets were fed from a hopper into a chute having its lower end closed,and the rivets were lifted vertically from the closed lower end of thechute by a carrier composed of jaws adapted to straddle the end of theraceway and engage the head of the rivet in their upward movement, thesaid carrier then beingvmoved laterally to place the rivet held by it inthe path of the movement of the top-set. In that application thepunchbar also has a Vibrating movement in order to put it into and thenout of punching position, and the machine was not adapted to operatewholly by power throughout the entire punching and setting operation.

In this my present invention, the rivets are put in bulk into a hopperand are delivered from the hopper into a chute provided with a properlet-off, the lower open end of the chute terminating opposite thebifurcated lower end of a carrier into which the rivets are dischargedor fed one at a time, the carrier always occupying such position withrelation to the topset as to enable the head of the rivet to passdirectly from the chute into the carrier and under the top-set. Thecarrier and top-set are mounted in the same carriage andare movedforward and backward, and also up and down, as will be hereinafterdescribed. The shank of the carrier is adapted to slide, however,vertically to a limited extent in the shank of the top-set bar. Thepunch bar and top-set bar are arranged side by side in one and the samecarriage, and both are adapted to be reciprocated vertically in thecarriage. The bars carrying the punch and the top-set are eachreciprocated from suitable eccentrics or cams upon the main shaft, and Ihave provided the machine herein to be described with devices whereby apresser-foot, which is rendered self adapting to the thickness of thestock, is made to control the extent of downward movement of the barcarrying the topset, so that the rivet will be upset more or lessaccording to the thickness of the material then present under thepresser-foot.

One part of my invention comprehends a rivet-setting machine containingthe following instrumentalities, vizz-an under-set, a top-set, apresser-foot, a top-set bar, means to actuate it, and tripping devicesto trip the actuating means of the topset bar according to the thicknessof the material under the presser-foot, substantially as will bedescribed.

Other features of my invention will be hereinafter described, andclaimed at the end of the specification.

Figure 1, of the drawings is apartial righthand side elevation of themachine containing my improvements, the fly-wheel and some of itsco-operating partsbeing omitted; Fig. l a detail of the lifting deviceof the hopper. Fig. 2 is a front elevation of the machine, Fig. 1,partially broken away to shorten the figure upon the drawings. Fig. 3 isa top or plan view of the machine shown in Fig. 1; Fig. 5, a section tothe left of the dotted line as, Fig. 2, the parts being somewhatenlarged; Fig. 5, anenlarged detail of the presser-bar, and its liftingdevice; Fig. 6, a detail showing the rear side] of the top-set bar andtopset. Fig. 7 is a detail of the carrier for the rivet. Fig. 8 is asection below the dotted line 00 Fig. 5; Fig. 9, a section below thedotted line 02 Fig. 7; Fig. 10, an enlarged detail of the blockcontaining the punch-bed and the under-set. Fig. 11 shows the cam 7 inoutline. Fig. 11, is a detail of part of the chute and let-off on it.Fig. 12 shows the letoff 6 detached; Fig. 13, a detail of the eccentricstud 12; and Fig. 14, a detail of centric stud 71 i The frame-workconsists essentially of a suitable base, not shown, upon which iserected a column A which sustains the head A of the machine, the saidhead containing an open slot or space A for the reception and maniputheeclation of the work, and having suitable bearings and attachments, tobe hereinafter described, for properly supporting the working parts.

The hopper B to contain the rivets is made as a sort of circular orsemispherical pot mounted upon a stud Bfixed to a stand 13, shown bestin Fig. 3, as attached to the upper part of the head A The upper part ofthe chute or raceway C of usual shape, is extended into the hopperreferred to, and has a suitable opening 2 into which are dropped therivets, the opening being of a width less than the diameter of the headsof the rivets, the upper end of the raceway having a cover 3 under whichthe heads of rivets properly lodged in the raceway must pass to bedischarged, as will be described.

The stud B, at one side of the hopper has mounted loosely upon it alifting device D, shown separately in part in Fig. 1, as a rotatingwheel having at its interior a series of shelves, as d, to engage therivets in the lower portion of the hopper, the shelves, in the rotationof the wheel, carrying the rivets up, and dropping theminto or upon theupper end of the chute.

The lifting device referred to derives its step-by-step motion by orthrough a suitable pawl d which engages notches thereof, as shown inFigs. 1, 1 and 3, said wheel being prevented from over-running itsmotion preferably by means of a friction device, which may be a spring Dduly interposed between the said wheel and the nut 0Z secured to theouter end of the stud B, referred to. The pawl d is attached to theupper end of an arm (1 of a sleeve d mounted on a stud d held preferablyin an ear projecting from a part of the hopper. See Fig. 1 The arm dreferred to at its upper end has attached to it alink d"', the oppositeend of which is attached to an arm of an elbow lever 01 having itsfulcrum on a pin 6 fixed to the frame, the shorter arm of the said leverentering, as herein shown, a suitable shoe 01 see Fig. 3, which is actedupon by a cam 7, the shape of which is best represented in Fig. 11, saidcam being, in this embodiment of my invention, fixed on the fly-wheel Eloose on the main shaft E, carrying the eccentrics and devices foractuating the moving parts to be described. The lever d carries asuitable brush 61 which, in the movement of the lever, is made to sweepacross the upper end of the raceway and discharge any rivets thereatwhich are not properly lodged with their shanks in the raceway. Theraceway is provided between its upper and lower ends with a suitablelet-off e, see Figs. 1, 11, and 12, pivoted at e and having a pin 6which is acted upon by a spring 6 attached to the side of the raceway,said spring normally keeping a projection e of the let-off in theraceway and in the path of movement of the series of rivets. The side ofthe raceway is cut away at e so that the projection 6 may move into andout of the line of travel of the rivets, it being held in place to actas a stop by the spring 6 the let-ofi being pushed in the oppositedirection to let 01f a rivet by means of a beveled or inclined arm 6carried by an arm of an elbow lever e mounted upon the stud 6 attachedto the head, the opposite end of said arm having a cam roll e whichenters a cam groove, see Fig. 1,in a disk 6 fast on the main shaft.

The lower arm of the elbow lever e referred to has attached to it a linkf, see Figs. 1 and 2, provided at its outer end with a round hole toreceive a stud screw 13, said stud entering the carriage f, saidcarriage being loosely mounted upon an eccentric stud 12, upon whichstud it will be reciprocated back and forth at the proper times by thesaid elbow lever and link to put the punch and top-set, to be described,in their proper positions with relation to the punch-bed and under-set.

The rotation of the eccentric stud provides means whereby the positionof the carriage may be adjusted laterally to enable the topset f and thepunch h to co-operate properly with the under-set f and punch-bed h, tobe hereinafter described.

The lower end of the elbow lever referred to has also connected to alink 9 which is jointed to a lever g pivoted at g the lower end of thelever 9 being connected by a link g with a stud g of the slide block gcarrying not only the punch block, but also the under-set.

The carriage f receives in it nearest the front of the machine thepunch-bar h, to the lower end of which is properly attached the punch h,the upper end of the bar having preferably an eccentric stud b which isembraced by the arm of an eccentric strap h encircling the eccentric itfast on the main shaft, the rotation of the said eccentric studproviding for vertical adjustment of the punch-bar.

The carriage f, at the rear of the punch-bar has suitable guideways forthe reception of the set bar m provided at its lower end with thetop-set f the said set bar at its upper end being herein represented,see Fig. 4, as socketed to receive one end of a toggle link 15, theopposite end of the said link being seated loosely in a part of aneccentric strap m surrounding an eccentric m also fast on the mainshaft.

The set bar is grooved at its rear side, as at 16, see Fig. 6, toreceive the slotted shank 'n of the rivet carrier n, bifurcated for asufficient portion of its length so as to leave yielding arms 50,50, seeFig. 9, which, while they grasp and retain the rivet i let into thespace n from the end of the raceway, may, under the action of thetop-set, or the head of the rivet being driven, spring apart to let therivet head pass below them.

The shank of the carrier is shown as provided with a pin 18 which restson a spring 01 carried by the top-set bar. See Figs. 4 and 6.

IIO

The eccentric strap m to which the set-bar is attached by the togglejoint referred to, has a friction device shown as a block 0" normallypressed against the eccentrics by a spring plate r held in place bysuitable screws 0* adjustable to insure the proper friction. This strapis so applied to the eccentric that when the main shaft is being rotatedin the direction of the arrow Fig. 4, the said eccentric will, duringthe first part of the movement of the shaft, be carried with the shaftso that the trip leg 19, forming part of the strap and to which theupper end of the toggle link is connected, will be thrown forward, asshown in Fig. 4, in the range of movement of the tripping deviceo, seeFig. 5,made adjustable vertically in a slot 0 of the shank o of theclamping or presser-foot 0 the said footbeing adapted to descend uponthe work.

The spring 0 seated in a hole in the frame head A acts on pin 0 see Fig.5, to normally keep a leaf or other equivalent spring 0adjustablyattached to the upper part of the presser-bar by suitablescrews 0 against and in the path of movement of a cam 0 fast on the mainshaft.

The cam 0 acting on the spring 0 pushes the presser or clamping footdown until it rests upon the surface ofthe work into which the rivet isto be driven, and thereafter the spring 0 owing to its shape, yieldsbefore the cam 0 and the foot is not farther forced down. In theoperation of the machine, however, as the clamping foot comes to restupon and calipers the thickness of the leather under it, the projection0 is of course stopped, but the shaft continues to rotate and theeccentric m acts to depress the top-set bar. The descent of thetop-setbar continues until the trip leg 19 of the eccentric strap meetsand is arrested by the tripping device or projection 0 on the foot bar,the arrest of the eccentric strap causing the upper end of the toggle 15to be carried over to the left from the position Fig. 4 in such mannerthat the descent of the topset will be arrested, such provision enablingthe rivet to be clinched or upset, more or less, at its end according tothe thickness of the stock under the foot.

The outer end of the main shaft is represented as provided with acounterbalance p fixed to the shaft, and the cam 7 referred to asconnected to the loose-pulley, or belt wheel E, has a series of dogs 20,and fast upon the shaft near the loose pulley is a notched collar p anda short distance from it a side cam 10 with a space 21 between. A slidebar p guided in a block 25 has a pin 26 which is engaged by alever 27having an arm 28 extended downwardly, said arm'having jointed to it arod 29 attached to a lever 10 pivoted at p and connected to a treadlerod 10 the operator by depressing the same causing the lever 27 towithdraw the slide-bar p from behind the dog r pivoted upon one side ofthe collar p Whenever the slide bar p is withdrawn to release the dog W,the latter drops sufficiently to place its upper end in the path ofmovement of one of the projections 20 on the belt wheel, and saidprojection, engaging the dog rotates the shaft, the said slide-bar whendrawn in as stated, removing a part of its projection 24 from itsengagement with a shoulder piece 42 secured to the cam 19, thus enablingthe shaft to start. The operator having retracted the slide bar p torelease the shaft E, the cam p acts immediately on the projection 24 toagain push the slide-bar outwardly, this being done before thecompletion of the rotation of the shaft, so that when the dog r againreaches the said slide-bar, the dog will be arrested by the slide-barand be pulled out of engagement with the projection 20, and at the sametime the shoulder piece 42 will strike the projection 24 and arrest thecam shaft positively.

'In the operation of the machine, the carriage 9 in which the punch-bedand under: set are secured, is moved in one direction, while thecarriage f containing the punch-bar and top-set is moved in the oppositedirection, and the machine is stopped after setting each rivet with thecarriage f in its backward position, and the carriage g in its forwardposition, the punch being over the punch-block. In this normal conditionof the machine, the operator will put into position the leather or othermaterial which is to be riveted together, and will, by a movement of thelever 12 start the machine. During the first part of the rotation of thecam shaft the punch bar descends and punches a hole'in the material, andthe punch then rises quickly and the carriages shift their position,putting the underset in working position and the top-set directly aboveit. The rivet-carrier and top-set move backward and forward together,and the rivet-carrier is supplied with a rivet just as the machine isstopped, the carriage f being then in its backward position. Thepunchbar havingbeen lifted, the carriage f is moved forward as thecarriage g is moved backward, and the point of the rivet hanging belowthe carrier is placed opposite the hole made in the material, and thetop-set descends upon the head of the rivet, pushes it vertically outfrom between the yielding arms of the carrier and drives the rivetthrough the hole previously made in the material, forcing the end of therivet against the under-set, the toggle joint 15 being broken sooner orlater, as described, according to the thickness of the material thenunder the presserfoot, thus adapting the clinching of the end of therivet to the thickness of the material to be fastened by that particularrivet.

During the operation of the machine a suitable hammer or device 44, seeFig. 2, connected with the sleeve 01 may strike and vi-. brate or shakethe raceway, and thus insure the correct falling or proper descent ofthe rivets to the carrier.

The rear side of the carrier is notched at M, as best shown in Fig. 7,to receive the head IIO of the rivet, letting the shank of the rivetdrop down between the inner sides of the bifurcated spring nipper-1ikearms thereof.

I have shown in Fig. 7, a rivet suspended from the carrier.

The carrier has shoulders 45, see Fig. 7, which strike against stops 46suitably attached to the carriage f, said stops limiting the backwardmovement of the carrier under the action of the spring 41?, said stopsand shoulders keeping the opening at the rear side of the carrier inproper position with relation to the end of the chute.

The carrier is normally kept up toward the lower end of the top-set bythe spring W, and when the top-set begins to descend, the carrierdescends with it until the under side of the carrier rests upon the topside of the clamp or presser-foot f The descent of the carrier havingbeen arrested, the top-sot con- V tinues to descend acting on the headof the rivet, pushing it down between the yielding jaws of the carrierand forcing the head of the rivet into the opening 47 made for it in thepresser-foot. This done, the top-set rises, the carrier follows untilarrested by the stop 46, and the carriage f is retracted into itsbackward position to receive a new rivet, and the machine is stoppedwith the presser-foot elevated ready for the material to be againinserted and punched as before.

This invention is not limited to the exact construction of theconnection between the eccentric strap and the top-set bar, so long asthe construction is such as to permit the descent of the bar to bearrested, preferably by or through the position of the presser-footresting upon the material so as to automatically clinch the rivet moreor less; nor is this invention limited to the particular construction ofthe friction device between the eccentric strap m and the eccentric mThe rivet which this machine is more particularly adapted to set is onehaving a hollow shank, but this invention is not limited to theparticular construction of the shank of the rivet to be set. The screw13 passes through an eccentric bushing f 10 screwed into the carriage f,the eccentric shank of the bushing shown by dotted lines in Fig. 1, being embraced by the link f. The eccentric collar 1 may be rotated whendesired to thus alter the position of the carriage f and link f, so thatsaid link may in its movements control the starting and stopping pointsof the carriage f in its extreme positions.

Having described my invention, what I claim, and desire to secure byLetters Patent, is-

1. In a machine for setting rivets, the following instrumentalities,viz;an under-set, a top-set, a presser-foot, a top-set bar, means toactuate it, and tripping devices to trip the actuating means of thetop-set bar according to the thickness of the material under the'presser-foot, substantially as described.

lowing instrumentalities, viz:a carriage; a. top-set bar having atop-set; and a carrier composed of a shank having at its lower endyielding arms, said bar and the shank having the carrier being bothmounted and being made vertically movable in said carriage; combinedwith a raceway from which rivets are discharged directly into thecarrier from its rear side next the open end of the race Way, the headsof the rivets entering the carrier falling directly under the top-set;and means to both reciprocate the said carriage to and fro and to movethe said top-set and carrier vertically in said carriage, substantiallyas and for the purpose set forth.

3. In a machine for setting rivets, a raceway; a carriage; a top-set bartherein provided with a top-set and grooved to act as a guide; and aspring contained in said topset bar; combined with a bifurcated carrierhaving its shank n inserted in said groove, the carrier having anopening 72 at its rear end toward and adapted to receive the rivets fromthe end of the raceway, said carrier being supported by said spring andbeing adapted to be moved vertically in and with relation to the saidtop-set bar, substantially as and for the purposes set forth.

4. In a machine for setting rivets, the cam -0 and vertically movablepresser-bar provided with the presser-foot, combined with the interposedspring 0 adapted to yield to the cam after the descent of the foot hasbeen arrested by the material, substantially as described.

5. In a machine for setting rivets, the carriage f, the reciprocatingbar it therein, and the eccentric strap, combined with the eccentricstud connecting said strap and bar, the rotation of the said studregulating the effective stroke of the bar, substantially as described.

6. In a machine for setting rivets, the horizontally movable carriage f,its contained punch-bar and top-set bar, and means to reciprocate saidcarriage, combined with an eccentric stud forming a support for saidcarriage, the rotation of the said stud enabling the said carriage to beadjusted laterally to place the punch-bar and top-set in correctposition with relation to the punch-bed and under-set, substantially asdescribed.

7. In a machine for setting rivets, the following instrumentalities,viz;an under-set, a top-set, a presser-foot, a top-set bar, means toactuate it; tripping devices to trip the actuating means of the top-setbar according to the thickness of the material under the presser-foot,and a punch and punch-bed, substantially as described.

8. In a machine for setting rivets, the following instrumentalities,viz;a carriage; a top-set bar having a top-set; a punch-bar providedwith a punch; and a carrier having yielding arms, said bars and carrierbeing mounted and made vertically movable in said carriage, and acarriage having an under-set and a punch-bed, combined with a raceway Iand stud to connect said link and carriage from which rivets aredischarged directly into and to permit the throw of the carriage to bethe carrier, the heads of the rivets falling diregulated, substantiallyas described.

rectly under the top-set, and means to recip- In testimony whereof Ihave signed my I 5 5 rocate the said carriage to and fro and to actnameto this specification in the presence of uate the said top-set andcarrier vertically, as two subscribing Witnesses.

and for the purposes setforth.

9. The carriage, its top-set bar, top-set, the HENRY CUMMINGSrivet-carrier, and the carriage-support,'com- Witnesses: IO bined withthe link f suitable actuating de- GEO. W. GREGORY,

vices therefor and with an eccentric collar M. J. SHERIDAN.

